I'd like to surprise my partner with a worthwhile upgrade for his CyberPower prebuilt, but I'm not very experienced with PC hardware. The system is a CyberPower GXiVR8060A8 with an ASRock B360M Xtreme motherboard, Intel Core i5-9400F processor, MSI GTX 1660 Ventus XS OC graphics card, and upgraded RAM and storage.
He mainly plays World of Warcraft, and recently the CPU is frequently near 100% usage unless he lowers the settings. I'm hoping to spend around $600–$1,000, preferably toward the lower end, rather than replacing the entire computer. Would a CPU upgrade provide the biggest improvement, and would it require a new cooler or power supply?
2 Answers
A newer CPU, motherboard, and possibly RAM bundle would offer better long-term value than investing heavily in the old platform. One reasonable route is a Ryzen 5 5600 with a B550 motherboard, reusing the existing DDR4 memory if it’s compatible. That would be a larger rebuild than simply replacing the processor, but it should perform much better in CPU-limited games. Before buying anything, check the power supply model, case dimensions, motherboard mounting format, and BIOS version because some prebuilt systems use unusual parts or connectors.
The CPU is probably the limiting part here, especially since World of Warcraft can put a lot of pressure on the processor. A used Core i7-9700 or i7-9700K could be a relatively simple upgrade for that motherboard, provided the BIOS supports 9th-generation CPUs. The non-K 9700 is usually the better choice if the price is reasonable. You’d want a proper tower-style CPU cooler for it, but you generally wouldn’t need a new power supply for this upgrade. Avoid paying too much for an i9-9900K, since the motherboard’s power delivery and current used prices make it a poor value.
How does the tower cooler fit into the system? There’s already a fan mounted at the back of the case—would that fan be replaced?

The rear case fan is an exhaust fan, not the CPU cooler. A tower cooler mounts directly over the processor with a heatsink and its own fan, while the existing rear fan usually stays in place to move warm air out of the case.